I guess that about does it for the welding... Now to get a little creative with the seam sealer.
Thanks for the tips on cutting the plexi. I didn't use ice water in a bottle. I froze some alcohol and put it in a spray bottle. That kept the blade cool I suppose. It cut nice and easy.
NOW just need to finish setting the plexi in its place with some u-bolts??? and this bulkhead will be done (mostly).